gcc --- __attribute __((interrupt(irq))) [英] gcc --- __attribute__((interrupt( irq )))

问题描述

我开始使用arm的设备驱动程序...在每个处理程序中我都看到--- __attribute__((interrupt( irq )))-..我很困惑此属性如何调用我们的驱动程序.. ??

i started with device driver for arm ... there i saw for each handler mention --- __attribute__((interrupt( irq ))) -.I am confused how this attribute will place a call to our driver routine ..??

机械臂的IRQ具有以下向量地址-0x00000018(或0xFFFF0018) 由于同一行上可以有许多中断处理程序.假设我们有4个设备驱动程序，每个驱动程序都有自己的IRQ.

IRQ of arm have following Vector address--- 0x00000018 (or 0xFFFF0018) As there can be many interrupt handler on same line. Suppose if we have 4 device driver each with its own IRQ to be reistered.

意味着GCC编译器将为IRQ处理程序&提供一些启动代码.编译器将在该中断处理程序的启动代码中调用例程.

Means some startup code will be provided by the GCC compiler for the IRQ handler & compiler will place call to our routine in that startup code for interrupt handler ..... Am i right ...?

推荐答案

来自

存在此属性时，编译器会生成适合在中断处理程序中使用的函数进入和退出序列.

The compiler generates function entry and exit sequences suitable for use in an interrupt handler when this attribute is present.

您可以轻松地使用objdump来查看此属性如何更改二进制文件，这将为您更好地阐明情况.

You can use objdump easily to see how this attribute changes your binary which should clarify the situation for you much better.

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